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Background  This study aimed to compare the lymph node core tissue lengths obtained via mediastinal or hilar lymphadenopathy using the complementary “rotation aiding” and conventional Jab technique.    Methods  We prospectively measured the lymph node core tissue length in patients who sequentially underwent the Jab and rotation aiding (RA) techniques between October 2012 and December 2014. Wilcoxon signed‐rank test was used to compare the core tissue length and grade of diagnostic cells obtained by each technique. McNemar's test was used to compare the proportion of adequate cellularity (≥grade 2) between the aspiration techniques.    Results  The core tissue length of 61 lymph nodes from 43 patients (mean age: 63 years, range: 16–86 years) was analyzed. Pathological findings were consistent with malignant lesions in 25 (41%) patients and benign lesions in 36 (59%). The most common diagnosis in benign lymph nodes was reactive, followed by tuberculosis and sarcoidosis. We obtained longer core tissue with RA technique than with the Jab technique (83.2 ± 12.7 vs. 60.1 ± 10.1 mm;  p  = 0.02). There was a significant increase in cellularity grade and proportion of ≥grade 2 cells with the RA technique than with the Jab technique (2.39 ± 1.08 vs. 1.84 ± 1.14;  p  < 0.001, 78.7% vs. 52.5%;  p  = 0.002), regardless of the pathological diagnosis.    Conclusions  RA technique facilitated more lymph node samples in terms of core tissue length and cellularity than the Jab technique.

thoracic cancer

Rotation aiding technique for endobronchial  ultrasound‐guided  transbronchial needle aspiration biopsy of intrathoracic lymph nodes: A complementary approach to the conventional jabbing method